<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <p>{{str}}</p>
        <button @click="str=str.split('').reverse().join('')">逆转世界</button>
    </div>


  <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>

    <script>
        const app = new Vue({
            el:'#app',
            data:{
                str:'Hello,Word'
            }
        })
    </script>
    
</body>
</html>